# QED radiative corrections for Polarized Lepton-Proton Scattering

## TL;DR

This paper analyzes quantum electrodynamics (QED) radiative corrections at first and second order for the parity-violating asymmetry in elastic electron-proton scattering, crucial for precise weak charge measurements in upcoming experiments.

## Contribution

It provides a detailed assessment of QED radiative corrections affecting the parity-violating asymmetry in elastic electron-proton scattering, relevant for high-precision experiments.

## Key findings

- Radiative corrections significantly impact the measured asymmetry.
- Bremsstrahlung causes a shift in momentum transfer Q^2.
- Corrections are essential for accurate weak charge determination.

## Abstract

We discuss QED radiative corrections at first and second order for the parity violating asymmetry $A_\text{PV}$ in elastic electron proton scattering. A measurement of $A_\text{PV}$ is planned at low energies and with high precision by the forthcoming P2 experiment at the new MESA facility in Mainz. Bremsstrahlung leads to a shift of the momentum transfer $Q^2$ which affects the determination of the weak charge of the proton.